Alarm-clock.



I. S. TRANE.

ALARM CLOCK. 7 APPLICATION FILED APR. I4, 1916.

2 SHEETS-SHEET 1.

Patentd July 31,

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J.S.TRANE.

ALARM CLOCK.

v APPLICATION nuzu APR-14. 1916.

1,234,829. Patented July 31,1917.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

JOSEPH s. TRANE, or PoNoHA SPRINGS, COLOR-ADO.

ALARM-CLOCK.

Application filed April 14, 1916.

To all whom it may concern:

Be it known that I, JOSEPH S. TRANE, a citizen of the United States,residing at Poncha Springs, in the county of Chaffee and State ofColorado, have invented new and useful Improvements in Alarm-Clocks, ofwhich the following is a specification.

This invention relates to clocks and has particular reference to alarmclocks.

The chief characteristic of the invention resides in the provision of amechanism for successively indicating the days of the week on the faceof the clock, together with means for preventing the sounding of thealarm on Sunday morning should the same be inadvertently set the nightbefore.

In carrying out the invention I provide a mechanism for the abovementioned purpose, which can be used in conjunction with an ordinaryconstruction of alarm clock, and can be associated therewith withoutchanging or altering the clock mechanism.

The nature and advantages of the invention will be better understoodfrom the following description when read in connection with theaccompanying drawings, the invention residing in the construction,combination and arrangement of parts as claimed.

In the drawings forming part of this specification like numerals ofreference indicate similar parts in the several views and in whichFigure 1 is a front elevation of a clock constructed in accordance withmy invention.

Fig. 2 is a side elevation partly in section.

Fig. 3 is a front elevation with the face of the clock removed.

Fig, 41 is an enlarged detail sectional View.

Fig. 5 is a detail view.

Before entering into a detail description of what is herein shown, Idesire to have it understood that the same is merely illustrative of oneembodiment of the invention to which I do not limit myself,- and thatcertain changes in the construction and ar rangement of parts may beresorted to when desired as fall within the scope of what is claimed.

Referring more particularly to the drawings in detail A indicates aclock of the Specification of Letters Patent.

Patented July 31, 1917.

Serial No. 91,177.

alarm type, which may be of any suitable construction, and may be in thenature of a one day, eight day, or thirty day clock, the alarm beingindicated generally at B and controlled by means of a mechanism of usualconstruction, intermittent or otherwise.

The alarm mechanism however includes a manually operable hand 10 forsetting the alarm, the hand being mounted upon a shaft 11 for rotationtherewith as in the usual construction of alarm clocks. This shaft hasloosely mounted thereon one gear 12 of a train of gears forming theclock mechanism, and cooperates with a resilient arm 13 to permit thesounding of the alarm. The arm 18 has a finger l1 projecting therefromat right angles, and normally disposed in the path of movement of thehammer arm 15 to prevent movement of the latter with a consequentsounding of the alarm. Fixed upon the shaft 11 for rotation therewith isa collar 16 disposed in advance of the gear 12, and provided with a lug17 normally engaging the hub of the gear 12. The lug 17 when settogether with the hand 10 in a predetermined position for the soundingof the alarm at a prescribed time, functions to hold the gear 12 in aretracted position against the tension of the resilient arm 13, andcauses the finger 11 on said arm to be disposed in the path of movementof the hammer arm 15. It is of course to be understood that the gear 12revolves once in every twelve hours, or in other words twice a day, andthe hub 18 thereof is provided with a cam Surface 19 which when movedacross the lug 17 permits the gear 12 to be thrust forward on the shaft11 under the influence of the resilient arm 13. During this operationthe finger 1 1 is moved out of the path of movement of the hammer arm 15which permits the sounding of the alarm. The clock however is providedwith the usual silence mechanism controlled by means of the lever 20which when in operative position prevents the sounding of the alarmunder any condition. The foregoing is the construction and operation ofthe ordinary alarm clock and does not form a part of this invention,

With a view of preventing the sounding of the alarm on Sunday morning orevery seventh day I preferably make use of a cog wheel 21 looselyjournaled upon a suitable support in proximity to the gear 12. The cogwheel is operated through a suitable connection between the same and thegear 12, and which connection preferably consists of a pin 22 carried bythe gear 12 and projecting therefrom to mesh with the teeth of the cogwheelon each and every revolution. The cog wheel is preferably providedwith fourteen teeth, thirteen of which are of uniform dimensions toclear a projection 23 extending forwardly from the resilient arm 13,while the remaining tooth 24 is relatively long to engage thisprojection for the purpose to be presently described. As above statedthe gear 12 revolves once in every 12 hours and through theinstrumentality of the pin 22 rotates the cog wheel 21 one space, or thedistance between two adjacent teeth thereof. In other words the cogwheel 21 is moved two spaces or the distance between three teeth thereofevery twenty-four hours, as the gear 12 revolves twice a day. Should thealarm mechanism be set for a predetermined time, with the silencer lever20 in an inoperative position, the alarm will sound without anyinterference on part of the cog wheel 21 except on Sunday or everyseventh day. In this connection it will be manifest that as the cogwheel 21 moves two spaces each day or in other words the distancebetween three teeth, that on the seventh day the relatively long tooth24 of the cog wheel is brought into engagement with the projection 23 onthe resilient arm 13. In this position of parts the finger 14 is held inits normal position, that is in the path of movement of the hammer arm15, and should the alarm be inadvertently set on the night before, thealarm will be prevented from sounding by reason of the disposition ofthe finger 14, as will be readily understood. As the gear 12 continuesto rotate the relatively long tooth 24 will be moved out of engagementfrom the projection 23 thereby rendering the alarm mechanism againoperative. The relatively long tooth however will not be moved out ofengagement from the projection until some time between twelve and oneoclock noon, and will not be active again until the seventh dayfollowing.

' In carrying out the invention I also provide means for successivelyindicating the days of the week on the face of the clock, and in thisinstance preferably make use of a cog wheel 25 loosely journaled inclose proximity to the gear 26-which carries the arbor 27 for the hourhand, and through which arbor projects the shaft 28 for the minute hand.Loosely journaled upon the frame of the clock mechanism is a third cogwheel 29 which is disposed below the gear 26 in close proximity thereto,and preferably comprises a series of eight teeth, every alternate toothcarrying a pin 30 which projects at right angles from the tooth formeshing engagement with the teeth of the cog Wheel 25 to intermittentlyrotate the latter upon rotation of the cog wheel 29. The cog wheel 25preferably includes a series of fourteen teeth, and secured upon oneface of the cog wheel 25 is a disk 31 containing indi cia indicative ofthe different days of the week, the indicia being arrangedcircumferentially of the disk as shown, so that each day will be singlypresented to view through the slot 32 in the face of the clock. It is ofcourse to be understood that the gear 26 makes two revolutions everytwentyfour hours, and this gear carries a pin 33 adapted to mesh withthe teeth of the cog wheel 29 to rotate the latter. The construction issuch that the cog wheel 29 is rotated two spaces or approximately thedistance between three of its teeth every twenty-four hours, and throughthe instrumentality of the pins 30 the cog wheel 25 is moved the sameproportionate distance with respect to its teeth in every twenty fourhours so that the indicia indicative of the days of the week carried bythe disk 31 is singly presented to view through the slot 32. This changeof day generally takes place between twelve oclock and one oclockmidnight.

The invention as will be obvious consists of very few parts which can beused in connection with different construction alarm clocks, withoutaltering or disturbing the arrangement of the clock mechanism. It isbelieved that from the foregoing description the nature and advantagesof the invention will be readily apparent although I desire to have itunderstood that the various parts of the invention may vary inproportion without departing from the spirit of the invention. 7

What is claimed is:-

In an alarm clock, an alarm mechanism including a movable hammer arm, aleaf spring secured at one end to the frame of the clock, a laterallydisposed finger projecting from the opposite extremity of said springnormally engaging the hammer arm to prevent movement of the latter,means cooperating with said spring to automatically 'move said fingerout of engagement with said arm at a predetermined interval for whichtime the alarm is set, a lug, projecting from the free extremity of saidspring in a direction opposite that of the said finger,

means for nullifying the action of the alarm mechanism for apredetermined period once structing position relative to said arm to inseven days, including a gear Wheel hav prevent sounding of the alarm.

ing a prescribed number of teeth, said Wheel In testimony whereof Iaifix my signabeing under control of the time mechanism, ture inpresence of tWo Witnesses.

and one of the teeth of said Wheel being JOSEPH S. TRANE. longer thanthe remaining teeth to engage Witnesses: 7

said lug, thereby holding said spring under WALLACE SoHooLrniLD, tensionand keeping the said finger in an ob- J OHN W. J AY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. 0.

